Calculation of Intraocular Lens in Patients after Previous Laser Refractive Surgery

Authors: Eva Maláková; Andrea Janeková
Authors place of work: Eye Centre Prague, Czech Republic
Published in the journal: Čes. a slov. Oftal., 81, 2025, No. Ahead of Print, p. 1-6
Category: Původní práce
doi: https://doi.org/10.31348/2025/22

Summary

Aim: The incidence of cataract surgery in patients after previous laser refractive surgery is increasing worldwide. However, the resulting uncorrected distance visual acuity (UDVA) after cataract surgery in these patients is less frequently satisfactory. The aim of this article is to present the results of cataract surgery in a group of patients who had undergone previous laser refractive surgery, in whom the IOL power was calculated only according to the currently measured values, and to compare them with the results from other workplaces.

Material and Methods: Our group incorporates 69 eyes of 43 patients. The data collection took place over a period of 33 months. The group included patients who attended at least one follow-up examination in the postoperative period. The resulting postoperative vision was considered to be vision determined at least 1 month after cataract surgery. Data were collected retrospectively.

Results: The resulting postoperative average monocular best corrected distance visual acuity (BCDVA) in the patients from our cohort was 0.024 LogMAR in the group of initially myopic patients and 0.030 LogMAR in the group of initially hypermetropic patients. Thus, BCDVA in myopic was better than in hypermetropic patients, without a statistically significant difference. Conversely, the resulting mean manifest spherical equivalent (MSE) was higher for myopic patients (-0.844) than for hypermetropic patients (-0.658), and this difference was evaluated as statistically significant. A refractive result above ±0.5 Dsf was present in 14 eyes, above ±1.0 Dsf in 6 eyes.

Conclusion: In 90% of patients we achieved an average MSE up to ±1.0 Dsf postoperatively. The results from our report regarding postoperative monocular BCDVA, BCNVA, mean SE and MSE are consistent with those from other reports dealing with this issue, although our cohort included a much smaller group of patients.